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There is a newer version: 3.9.0

/*
 * tksCommons / mugwort
 *
 * Author : Thomas Kuhlmann (ThK-Systems, http://www.thk-systems.de) License : LGPL (https://www.gnu.org/licenses/lgpl.html)
 */
package de.thksystems.validation.beanvalidation;

import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;

import de.thksystems.exception.ServiceRuntimeException;
import de.thksystems.util.reflection.ReflectionUtils;

public class DependantNotEmptyValidator extends AbstractNotEmptyValidator implements ConstraintValidator {

    private String fieldname;

    private String dependantField;

    private String depandantValue;

    @Override
    public void initialize(DependantNotEmpty constraintAnnotation) {
        fieldname = constraintAnnotation.fieldname();
        dependantField = constraintAnnotation.dependantField();
        depandantValue = constraintAnnotation.dependantValue();
    }

    @Override
    public boolean isValid(Object container, ConstraintValidatorContext context) {
        try {
            Object currentConditionValue = ReflectionUtils.getFieldValue(container, container.getClass().getDeclaredField(dependantField));
            if ((currentConditionValue == null && depandantValue == null) || (currentConditionValue != null && currentConditionValue.equals(depandantValue))
                    || (currentConditionValue != null && currentConditionValue.toString().equals(depandantValue))) {
                Object fieldValue = ReflectionUtils.getFieldValue(container, container.getClass().getDeclaredField(fieldname));
                return isNotEmpty(fieldValue);
            }
            return true;
        } catch (IllegalArgumentException | IllegalAccessException | NoSuchFieldException | SecurityException e) {
            throw new ServiceRuntimeException(e.getMessage(), e);
        }
    }

}